class People{
    float hello(int a, int b){
        return a+b;
    }
    float hello(long a, int b){
        return a-b;
    }
    double hello(double a, int b){
        return a*b;
    }
}
public class Example4_12{
    public static void main(String[] args) {
        People tom = new People();
        System.out.println(tom.hello(10,20));
        System.out.println(tom.hello(10L,20));
        System.out.println(tom.hello(10.0,20));
    }
}